from django.shortcuts import render

# Create your views here.
from django.views.generic import View
from goods.models import GoodsCategory,GoodsChannel
from contents.models import ContentCategory
from collections import OrderedDict

# Create your views here.
class CategoryView(View):
    """
    获取首页分类数据

    GET /goods/categories/
    """
    def get(self,request):
        # 使用有序字典保存类别的顺序
        # categories = {
        #     1: { # 组1
        #         'channels': [{'id':, 'name':, 'url':},{}, {}...],
        #         'sub_cats': [{'id':, 'name':, 'sub_cats':[{},{}]}, {}, {}, ..]
        #     },
        #     2: { # 组2
        #
        #     }
        # }
        # 初始化存储容器
        categories = OrderedDict()
        # 获取一级分类
        channels = GoodsChannel.objects.order_by('group_id', 'sequence')

        # 对一级分类进行遍历
        for channel in channels:
            # 获取group_id
            group_id = channel.group_id
            # 判断group_id 是否在存储容器,如果不在就初始化
            if group_id not in categories:
                categories[group_id] = {
                    'channels': [],
                    'sub_cats': []
                }

            one = channel.category
            # 为channels填充数据
            categories[group_id]['channels'].append({
                'id': one.id,
                'name': one.name,
                'url': channel.url
            })
            # 为sub_cats填充数据
            for two in one.goodscategory_set.all():
                # 初始化 容器
                two.sub_cats = []
                # 遍历获取
                for three in two.goodscategory_set.all():
                    two.sub_cats.append(three)

                # 组织数据
                categories[group_id]['sub_cats'].append(two)

        contents = {}
        content_categories = ContentCategory.objects.all()
        # content_categories = [{'name':xx , 'key': 'index_new'}, {}, {}]

        # {
        #    'index_new': [] ,
        #    'index_lbt': []
        # }
        for cat in content_categories:
            contents[cat.key] = cat.content_set.filter(status=True).order_by('sequence')

        context = {
            'categories': categories,
            'contents': contents
        }
        return render(request, 'home.html', context)

from rest_framework.generics import GenericAPIView,ListAPIView
from users.serializers import SKUSerialzier
from goods.models import SKU
from rest_framework.response import Response
"""热销商品展示"""
# class HotSKUView(GenericAPIView):
#     """
#         分析：GET /goods/categories/(?P<category_id>\d+)/hotskus/
#             1.	前端需要传递一个商品分类的id
#             2.	根据商品分类的id查询商品的数据，对数据进行排序处理，同事闲置查询结果集
#             3.	将模型结果转化成json返回给前端
#
#     """
#     def get(self,request,category_id):
#
#         skus = SKU.objects.filter(category_id=category_id,is_launched=True).order_by("-sales")[:2]
#
#         serializer = SKUSerialzier(instance=skus,many=True)

        # return Response(serializer.data)

"""热销商品的展示的第二中方式ListAPIView"""

class HotSKUView(ListAPIView):
    """通过ｄｅｂｕｇ方式调试获取方法"""

    serializer_class = SKUSerialzier
    pagination_class = None

    def get_queryset(self):

        category_id = self.kwargs.get('category_id')

        return SKU.objects.filter(category_id=category_id,is_launched=True)


from rest_framework.pagination import PageNumberPagination,LimitOffsetPagination

"""商品列表数据"""
from rest_framework.filters import OrderingFilter
class SKUListAPIView(ListAPIView):

    serializer_class = SKUSerialzier

    def get_queryset(self):

        category_id = self.kwargs.get('category_id')

        return SKU.objects.filter(category_id=category_id,is_launched=True)

    # 对商品列表数据进行排序
    filter_backends = [OrderingFilter]

    # 指定要排序的字段
    orderding_fields = ['sales','price','create_time']


from .serializers import SKUIndexSerializer
from drf_haystack.viewsets import HaystackViewSet

class SKUSearchViewSet(HaystackViewSet):
    """
    SKU搜索
    """
    index_models = [SKU]

    serializer_class = SKUIndexSerializer







